Facsimile and static presentation processing – Static presentation processing – Attribute control
Patent
1989-08-02
1991-10-01
Wieder, Kenneth A.
Facsimile and static presentation processing
Static presentation processing
Attribute control
358 80, H04N 146
Patent
active
050538667
ABSTRACT:
The present invention is designed to operate with a digital imaging device which reproduces in hardcopy an original color image. In order to make high quality reproductions, that is reproductions which correspond in finished color to the color of the original image, the method of the present invention operates upon the original color densities with a color correction module that has as its input the desired red, green, and blue densities, and which outputs the modified red, green, and blue densities which can be considered to be channel-independent aim control signals for the imaging device. In the event that external conditions change which prevent the desired red, green, and blue densities from being achieved when the color correction module is utilized, a neutral adjustment module is activated which takes as its inputs the red, green, and blue aim control signals from the color correction module and outputs adjusted red, green, and blue signals which are directed to the imaging device. The derivation of the parameters for the neutral adjustment module is accomplished by the production of a hardcopy image of neutral color patches. The densities of the patches are measured and provided to the color correction module to determine the correct relationships between red, green, and blue signals output from the color correction module and the resulting densities.
REFERENCES:
patent: 4710785 (1987-12-01), Mills
patent: 4751569 (1988-06-01), Clinton et al.
patent: 4779106 (1988-10-01), Mills
patent: 4929978 (1990-05-01), Kanamori et al.
Authors--T. O. Maier and C. E. Rinehart, Title--"Design Criteria for an Input Color Scanner Evaluation Test Object", Data--May 2-3, 1988, Presented at TAGA Conference.
Brown Glenn W.
Dugas Edward
Eastman Kodak Company
Wieder Kenneth A.
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